Hi,
Our Internet BGP tier is currently provided by a pair of 7206VXR routers with NPE-G1s which are getting quite long in the tooth. We've recently been able to reclaim a pair of Sup720-3BXLs and the associated 6509 chassis'. Its our intention to retire the 7206s and replace them with the 6509s /w Sup720s but we require 6 GigE interfaces per box. We have a pair of WS-X6408A-GBIC 'classic bus' linecards on the shelf (no spare 65XX or 67XX modules unfortunately) but my question is whether using the WS-X6408A-GBIC to provide port capacity is a good or bad idea in this scenario? I appreciate that using a WS-X6408A-GBIC means that the classic 32Gbps shared bus will be used (with a max of 15Mpps per system) but in raw performance numbers this is a significant increase on the 7206VXR/NPE-G1s ~2Gbps backplane and ~1Mpps forwarding rate. My real concern is that I've found two different Cisco documents that describe the Forwarding-Engine Architecture differently for classic linecards. This link :- http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_data_sheet0900aecd801459a7.html states that "the Supervisor engine CPU makes forwarding decision" and this link:- http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_data_sheet0900aecd8017376e.html states that "Centralized Cisco Express Forwarding engine located on supervisor policy feature card (PFC) makes forwarding decision" As the 6500 series is a hardware-based platform I'm keen to make use of hardware-supported features where available and not experience unexpected issues from high CPU utilisation. Can anyone confirm exactly how traffic will be forwarded by the Sup720-3BXL with a WS-X6408A-GBIC in the chassis? Thanks in advance, Matthew _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
